so i have had my weber installed for about a year, havent had any issues with it the whole time.

yesterday i noticed i had an oil leak when i was leaving work. it wasnt bad so i proceded to drive home. i got home and started rooting around under the hood to see if i could locate the leak. turns out its a valve cover gasket.

while i was under the hood i noticed my fuel pressure gauge was acting funny.

here is a video of what it was doing.

when i installed the carb and pressure reg it fluttered a little bit. maybe about 1/8-1/4 of a psi. im not to savvy with carbs but i assumed this was some what normal and it wasnt a drastic change so i went about my business.

also i tried to adjust the pressure on my reg and it would not change if i went 100% open. it still jumped from 0-2psi.

it runs great. starts the first time every time. never had any vapor lock issues.

pump is cheap and easy to replace. Might as well change it. But a pump that is working hard to pull fuel will also do it. Filter can get clogged in a short period of time. I had a test chart on how much fuel a manual pump can move. You take the hose off and put in a bottle and crank the engine for only 10 seconds. It would fill about 1/2 way on a coke bottle.

hey tippman...
mine is exactly the same...i thought it was the fuel pump..now i have a brand new pump, no fpr, and it does exactly the same thing.
i don't know what to make of it but really don't have any problems with it

I just had this same problem on my VW dune buggy. the needle bounced around like crazy. But my pump is electric, and I could hear it running. I replaced the filter and bam solid 7psi. It would even pump a bunch out using the test, but not under pressure.